unuseableness

Example:His old car demonstrated a glaring uselessness during the storm when it simply would not start.

Definition:The state or quality of being useless; the absence of useful properties or qualities.

Example:Due to the long shelf life of these vaccines, their efficacy is questionable, leading to ineffectiveness in combating the disease.

Definition:The condition or quality of being ineffective; the lack of power to produce a desired effect.